Exhibit 23.4

June 27, 2018

Aurora Mobile Limited

5/F, Building No. 7,

Zhiheng Industrial Park, Nantou Guankou Road 2, Nanshan District

Shenzhen, Guangdong, 518052

People’s Republic of China

Dear Sirs:

Pursuant to Rule 438 under the Securities Act of 1933, as amended, I hereby consent to the references to my name in the Registration Statement on Form F-1 (the “Registration Statement”) of Aurora Mobile Limited (the “Company”) and any amendments thereto, which indicate that I have accepted the nomination to become a director of the Company. I further agree that immediately upon the United States Securities and Exchange Commission’s declaration of effectiveness of the Registration Statement, I will serve as a member of the board of directors of the Company.

*        *        *

Sincerely yours,

/s/ John Tiong Lu Koh

Name: John Tiong Lu Koh

[Signature Page to Consent of Independent Director]